Uranium separation material and preparation method thereof

Abstract

The invention discloses a material for separating uranium from alkaline nuclear industry low-level radioactive wastewater and seawater and a preparation method of the material. The material for separating uranium is quaternary ammonium salt or quaternary phosphonium salt grafted silicon dioxide. The material can form stable covalent bonds with organic functional groups; the balance time is moderate, and the balance of surface activation can be achieved within multiple hours; the material is a high-specific-surface-area matrix material and is low in cost; silicon has a high-quality exchange characteristic and does not expand; and the material has the advantages of good organic solvent resistance and very high thermal resistance.

Description

technical field [0001] The present invention relates to a material capable of separating uranium and a preparation method thereof. Specifically, the present invention relates to a material capable of separating uranium from alkaline nuclear industry low-level waste water and seawater and a preparation method of the material. Background technique [0002] With the rapid development of the nuclear industry, nuclear-related enterprises have produced a large amount of radioactive wastewater. In order to prevent environmental pollution caused by the migration of radionuclides, the radioactive wastewater must be treated to reduce the possibility of harm [1]. [0003] Wastewater from the nuclear industry is a kind of high-salinity low-level radioactive wastewater. When pH>8, uranium is mainly [UO 2 (CO 3 ) 3 ] 4- form, the coexisting anions are mainly NO 3 - , SO 4 2- , CO 3 2- , F - , Cl - 、HCO 3 2- , TcO 4 - . In the past few decades, a variety of uranium separ...

AI Technical Summary

Problems solved by technology

However, there are many disadvantages in organic anion exchange resins:

[0010] (1) The chemical stability is not high;

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